Yerba Buena Center for the Arts Galleries."Perfect Spaces: Pictures and Films by Oliver Boberg": A survey of the German's artist work, in which he photographs his equisitely detailed scale models of industrial spaces, such as loading docks and highways. Through June 26. Free-$6. www.ybca.org. "Visual Aid at Sixteen With David Cannon Dashiell's Queer Mysteries": A retrospective of the work created by artists involved with Visual Aid, a nonprofit that helps artists with terminal illnesses. Its most ambitious work is David Cannon Dashiell's Queer Mysteries, a huge erotic painting that nods to a Pompeiian mural. Through June 26. Free-$6. www.ybca.org. "The Museum of the Last Artwork: New Work by Robert Kusmirowski": A genre-breaking artist from Poland is best known for "falsification" of ordinary objects. Yerba Buena has commissioned its very own "false" site-specific installation for this exhibit. Through June 26. Free-$6. www.ybca.org. 701 Mission (at Third St.), 978-2787.
Zeum."Toyz": Hands-on activities teach kids about the latest in tech toys. Daily. Free with museum admission, free-$7. 221 Fourth St. (at Howard), 777-2800.